My friend watched one of those talent shows on TV and whenever she had someone she liked, she would call all of her friends to call in the votes for that person. It was kind of funny to me, because I don't watch those shows and couldn't care who wins so I just told her I would do it and then not do it. I didn't need to upset her or lecture her on the reason they limited the number of calls from a specific number.
I am of a different mindset though, in an online quilt shop deal and it being a last minute dark horse win, I would be more suspicious of the shop itself so it wouldn't have to pay off the winner. These are tough times and people do weird things. It's kind of like that - $10 gift certificate and low and behold the shipping and handling is $9.99 to start. That's nice if you need something else, but why not just say you won free shipping.